Remove an arena_bin_run_size_calc() constraint.
Remove an arena_bin_run_size_calc() constraint.

Remove the constraint that small run headers fit in one page.  This
constraint was necessary to avoid dirty page purging issues for unused
pages within runs for medium size classes (which no longer exist).

ahmetmircik/jemalloc,shekkbuilder/jemalloc,shekkbuilder/jemalloc,sudosurootdev/external_jemalloc,wfxiang08/jemalloc,cpeterso/jemalloc,wfxiang08/jemalloc,kmiku7/jemalloc,lvfeng1130/jemalloc,awreece/jemalloc,sudosurootdev/external_jemalloc,lvfeng1130/jemalloc,wespelee/jemalloc,VRToxin/android_external_jemalloc,leebaok/jemalloc-4.2.1-readcode,flyfeifan/jemalloc,8l/jemalloc,yy-nm/jemalloc,sudosurootdev/external_jemalloc,geekboxzone/mmallow_external_jemalloc,Snaipe/jemalloc,vashstorm/jemalloc,wqfish/jemalloc,dcreager/jemalloc,splbio/jemalloc,percona/jemalloc-debian,garoose/jemalloc,wespelee/jemalloc,leebaok/jemalloc-4.2.1-readcode,sudosurootdev/external_jemalloc,tempbottle/jemalloc,TeamExodus/external_jemalloc,wqfish/jemalloc,wespelee/jemalloc,jemalloc/jemalloc-cmake,vashstorm/jemalloc,vashstorm/jemalloc,xin3liang/platform_external_jemalloc,CyanogenMod/android_external_jemalloc,CyanogenMod/android_external_jemalloc,lvfeng1130/jemalloc,dxq-git/jemalloc,wqfish/jemalloc,CMRemix/android_external_jemalloc,leebaok/jemalloc-4.2.1-readcode,xin3liang/platform_external_jemalloc,yy-nm/jemalloc,flyfeifan/jemalloc,8l/jemalloc,ahmetmircik/jemalloc,lilothar/jemalloc,splbio/jemalloc,AndroidExternal/jemalloc,jemalloc/jemalloc-cmake,wfxiang08/jemalloc,Snaipe/jemalloc,geekboxzone/mmallow_external_jemalloc,Dmitry-Me/jemalloc,awreece/jemalloc,dxq-git/jemalloc,wqfish/jemalloc,geekboxzone/mmallow_external_jemalloc,CMRemix/android_external_jemalloc,AndroidExternal/jemalloc,percona/jemalloc-debian,glandium/jemalloc,dcreager/jemalloc,Snaipe/jemalloc,TeamExodus/external_jemalloc,geekboxzone/mmallow_external_jemalloc,awreece/jemalloc,garoose/jemalloc,android-ia/platform_external_jemalloc,8l/jemalloc,TeamExodus/external_jemalloc,percona/jemalloc-debian,jemalloc/jemalloc-cmake,dxq-git/jemalloc,shekkbuilder/jemalloc,yy-nm/jemalloc,AndroidExternal/jemalloc,flyfeifan/jemalloc,geekboxzone/lollipop_external_jemalloc,percona/jemalloc-debian,geekboxzone/lollipop_external_jemalloc,Dmitry-Me/jemalloc,CyanogenMod/android_external_jemalloc,CyanogenMod/android_external_jemalloc,splbio/jemalloc,geekboxzone/lollipop_external_jemalloc,CMRemix/android_external_jemalloc,wespelee/jemalloc,glandium/jemalloc,lvfeng1130/jemalloc,wfxiang08/jemalloc,CMRemix/android_external_jemalloc,ahmetmircik/jemalloc,tempbottle/jemalloc,TeamExodus/external_jemalloc,cpeterso/jemalloc,xin3liang/platform_external_jemalloc,Dmitry-Me/jemalloc,lilothar/jemalloc,AndroidExternal/jemalloc,ahmetmircik/jemalloc,Snaipe/jemalloc,android-ia/platform_external_jemalloc,glandium/jemalloc,cpeterso/jemalloc,lilothar/jemalloc,Dmitry-Me/jemalloc,jemalloc/jemalloc-cmake,lilothar/jemalloc,android-ia/platform_external_jemalloc,kmiku7/jemalloc,flyfeifan/jemalloc,dxq-git/jemalloc,wqfish/jemalloc,kmiku7/jemalloc,leebaok/jemalloc-4.2.1-readcode,garoose/jemalloc,yy-nm/jemalloc,tempbottle/jemalloc,kmiku7/jemalloc,vashstorm/jemalloc,VRToxin/android_external_jemalloc,VRToxin/android_external_jemalloc,xin3liang/platform_external_jemalloc,shekkbuilder/jemalloc,tempbottle/jemalloc,dcreager/jemalloc,cpeterso/jemalloc,geekboxzone/lollipop_external_jemalloc,VRToxin/android_external_jemalloc,awreece/jemalloc,8l/jemalloc,glandium/jemalloc,garoose/jemalloc,android-ia/platform_external_jemalloc